Oscar François de Jarjayes is a central character in the series 'Yami no Tamashii'. She is a brave and noble woman who defies societal norms by being raised as a man to succeed her father as the commander of the Royal Guards. Oscar is known for her strong sense of justice and loyalty, often finding herself caught between her duties and her personal beliefs. Throughout the series, she navigates the intricacies of court politics while dealing with her own internal struggles. Her character embodies themes of identity, duty, and the pursuit of truth.